ALSA: isa/gus: remove 'set but not used' warning

Fix W=1 warning by noting variable as __always_unused.

sound/isa/gus/gus_uart.c: In function ‘snd_gf1_interrupt_midi_in’:
sound/isa/gus/gus_uart.c:16:22: warning: variable ‘data’ set but not
used [-Wunused-but-set-variable]
   16 |  unsigned char stat, data, byte;

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200702193604.169059-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/isa/gus/gus_uart.c b/sound/isa/gus/gus_uart.c
index 7586619..4fb4ed7 100644 (file)
--- a/sound/isa/gus/gus_uart.c
+++ b/sound/isa/gus/gus_uart.c
@@ -13,7 +13,8 @@
 static void snd_gf1_interrupt_midi_in(struct snd_gus_card * gus)
 {
        int count;
-       unsigned char stat, data, byte;
+       unsigned char stat, byte;
+       __always_unused unsigned char data;
        unsigned long flags;
 
        count = 10;